EFCO 8800 Series Assembly Instructions Vol.5 - Manual (Page 35)

EFCO 2009 Page 35
Series 8700 / 8800 Unitized Curtain Wall Assembly Instructions - Volume 5
Section 23 - SSG Vent Unit Glazing at Stack Sill : D. Weather Seal Application
Figure 53
1. Using an approved solvent or cleaner, clean the sealant contact surfaces of the glazing and adapters of all oils and other contaminants.
2. If sealant primer is required, apply it per the primer/sealant manufacturer’s instructions.
3. Insert 3/8” diameter backer rod between the glazing and adapters around all four corners of each lite of glazing. Refer to Volume 2, Figure 38 page 17 for
more information.
4. Apply sealant into the void between the adapters and glazing to form the weather seal and tool smooth. If the sealant is properly and carefully applied,
masking tape on the adjacent surfaces is not necessary.
5. Seal the ends of adapter at the head of the vent, running the sealant to the face of the vertical, but not across the face of the vertical. This allows weeps for
the glazing pocket of the lite above the vent. Tool the sealant neatly into the adjacent surfaces. Slide the WS00 gasket out of the way to apply this seal.
Return WS00 to its former position after sealing. See Figure 56.
6. Before the sealant begins to cure or skin over, tool the sealant into the joints smoothly, taking care to smooth and blend the sealant in the corners and
intermediate intersections as shown below. See Figures 54 through 57. Seen in section view, the sealant should have an hourglass shape and maintain a
2:1 width to depth ratio as shown in Volume 2, Figure 38 on page 17. Remove any excess sealant from the surrounding surfaces before the sealant begins
to cure.
HEAD SILL
No sealant is required
at this location.
VENT HEAD
Sealant continuity
joint and weather
seals.
Figure 54 Figure 56 Figure 55 Figure 57
Omit sealant at the
face of the vertical
to create weeps for
the lite above.
VENT SILL
Slide back WS00
gasket and seal the
adapters as shown.
Sealant continuity
joint and weather
seals.